// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "cc/trees/clip_expander.h"
#include "cc/trees/effect_node.h"
#include "cc/trees/property_tree.h"
#include "ui/gfx/transform.h"

namespace cc {

ClipExpander::ClipExpander(int filter_effect_id)
    : target_effect_id_(filter_effect_id)
{
}

ClipExpander::ClipExpander(const ClipExpander& other) = default;

bool ClipExpander::operator==(const ClipExpander& other) const
{
    return target_effect_id_ == other.target_effect_id_;
}

gfx::Rect ClipExpander::MapRect(const gfx::Rect& rect,
    const PropertyTrees* property_trees) const
{
    const EffectNode* effect_node = property_trees->effect_tree.Node(target_effect_id_);
    gfx::Transform filter_draw_transform;
    filter_draw_transform.Scale(effect_node->surface_contents_scale.x(),
        effect_node->surface_contents_scale.y());
    return effect_node->filters.MapRect(rect, filter_draw_transform.matrix());
}

gfx::Rect ClipExpander::MapRectReverse(
    const gfx::Rect& rect,
    const PropertyTrees* property_trees) const
{
    const EffectNode* effect_node = property_trees->effect_tree.Node(target_effect_id_);
    gfx::Transform filter_draw_transform;
    filter_draw_transform.Scale(effect_node->surface_contents_scale.x(),
        effect_node->surface_contents_scale.y());
    return effect_node->filters.MapRectReverse(rect,
        filter_draw_transform.matrix());
}

} // namespace cc
